Mesh extraction algorithms

The Fourier transform has been discussed in the context of FTIR. The mathematical goal of the transform is to detect periodicity in the signal produced by the interferometer. Periodicity refers to a repeating pattern, such as individual scans from 4000-400 cm The periodic table is called "periodic" because patterns such as outer electron configurations are repeated. Forensic researchers in Japan have reported using an FT algorithm to extract periodicity or repeated patterns in the surface of manufactured paper. Such patterns could arise from the wire mesh on which the pulp is dried or from the rollers used to press the paper. 

Pieta composed of 14M triangle mesh generated from more than 700 scans (Bernardini et al., 1999), reconstruction of "Pisa Cathedral" (Pisa, Italy) from laser scans with over 154M samples (Cuccuru et al., 2009), and head and cerebral structures (hidden) extracted from 150 MRI slices using the marching cubes algorithm (about 150,000 triangles), as shown in Fig. 3. 

---